I imagine this is where the figure comes from.
The combined company has secured approximately $6 billion of fully-committed financing, led by Barclays, Credit Agricole CIB and Goldman Sachs & Co. LLC, and it is expected that permanently funded debt financing in the form of term loans and unsecured bonds will be put into place prior to closing.
You can lead a horse to water. But you can't make him get down on one knee and do an Al Jolson impression!